#include "features/i386/i386.c"
#include "features/i386/i386-avx.c"
+#include "features/i386/i386-mmx.c"
/* Register names. */
paddress (gdbarch, retaddr));
}
}
+
+static void
+append_insns (CORE_ADDR *to, ULONGEST len, const gdb_byte *buf)
+{
+ target_write_memory (*to, buf, len);
+ *to += len;
+}
+
+static void
+i386_relocate_instruction (struct gdbarch *gdbarch,
+ CORE_ADDR *to, CORE_ADDR oldloc)
+{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[I386_MAX_INSN_LEN];
+ int offset = 0, rel32, newrel;
+ int insn_length;
+ gdb_byte *insn = buf;
+
+ read_memory (oldloc, buf, I386_MAX_INSN_LEN);
+
+ insn_length = gdb_buffered_insn_length (gdbarch, insn,
+ I386_MAX_INSN_LEN, oldloc);
+
+ /* Get past the prefixes. */
+ insn = i386_skip_prefixes (insn, I386_MAX_INSN_LEN);
+
+ /* Adjust calls with 32-bit relative addresses as push/jump, with
+ the address pushed being the location where the original call in
+ the user program would return to. */
+ if (insn[0] == 0xe8)
+ {
+ gdb_byte push_buf[16];
+ unsigned int ret_addr;
+
+ /* Where "ret" in the original code will return to. */
+ ret_addr = oldloc + insn_length;
+ push_buf[0] = 0x68; /* pushq $... */
+ memcpy (&push_buf[1], &ret_addr, 4);
+ /* Push the push. */
+ append_insns (to, 5, push_buf);
+
+ /* Convert the relative call to a relative jump. */
+ insn[0] = 0xe9;
+
+ /* Adjust the destination offset. */
+ rel32 = extract_signed_integer (insn + 1, 4, byte_order);
+ newrel = (oldloc - *to) + rel32;
+ store_signed_integer (insn + 1, 4, newrel, byte_order);
+
+ /* Write the adjusted jump into its displaced location. */
+ append_insns (to, 5, insn);
+ return;
+ }
+
+ /* Adjust jumps with 32-bit relative addresses. Calls are already
+ handled above. */
+ if (insn[0] == 0xe9)
+ offset = 1;
+ /* Adjust conditional jumps. */
+ else if (insn[0] == 0x0f && (insn[1] & 0xf0) == 0x80)
+ offset = 2;
+
+ if (offset)
+ {
+ rel32 = extract_signed_integer (insn + offset, 4, byte_order);
+ newrel = (oldloc - *to) + rel32;
+ store_signed_integer (insn + offset, 4, newrel, byte_order);
+ if (debug_displaced)
+ fprintf_unfiltered (gdb_stdlog,
+ "Adjusted insn rel32=0x%s at 0x%s to"
+ " rel32=0x%s at 0x%s\n",
+ hex_string (rel32), paddress (gdbarch, oldloc),
+ hex_string (newrel), paddress (gdbarch, *to));
+ }
+
+ /* Write the adjusted instructions into their displaced
+ location. */
+ append_insns (to, insn_length, buf);
+}
+
\f
#ifdef I386_REGNO_TO_SYMMETRY
#error "The Sequent Symmetry is no longer supported."
struct regcache *regcache, int regnum,
const void *xstateregs, size_t len)
{
- const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
i387_supply_xsave (regcache, regnum, xstateregs);
}
const struct regcache *regcache,
int regnum, void *xstateregs, size_t len)
{
- const struct gdbarch_tdep *tdep = gdbarch_tdep (regset->arch);
i387_collect_xsave (regcache, regnum, xstateregs, 1);
}
tdep->jb_pc_offset = 36;
/* DJGPP does not support the SSE registers. */
- tdep->num_xmm_regs = 0;
- set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I387_NUM_REGS);
+ if (! tdesc_has_registers (info.target_desc))
+ tdep->tdesc = tdesc_i386_mmx;
/* Native compiler is GCC, which uses the SVR4 register numbering
even in COFF and STABS. See the comment in i386_gdbarch_init,
set_gdbarch_sdb_reg_to_regnum. */
set_gdbarch_stab_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
set_gdbarch_sdb_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum);
+
+ set_gdbarch_has_dos_based_file_system (gdbarch, 1);
}
\f
/* Get core registers. */
feature_core = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.core");
+ if (feature_core == NULL)
+ return 0;
/* Get SSE registers. */
feature_sse = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.sse");
- if (feature_core == NULL || feature_sse == NULL)
- return 0;
-
/* Try AVX registers. */
feature_avx = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.avx");
/* The XCR0 bits. */
if (feature_avx)
{
+ /* AVX register description requires SSE register description. */
+ if (!feature_sse)
+ return 0;
+
tdep->xcr0 = I386_XSTATE_AVX_MASK;
/* It may have been set by OSABI initialization function. */
tdep->ymm0h_regnum + i,
tdep->ymmh_register_names[i]);
}
- else
+ else if (feature_sse)
tdep->xcr0 = I386_XSTATE_SSE_MASK;
+ else
+ {
+ tdep->xcr0 = I386_XSTATE_X87_MASK;
+ tdep->num_xmm_regs = 0;
+ }
num_regs = tdep->num_core_regs;
for (i = 0; i < num_regs; i++)
valid_p &= tdesc_numbered_register (feature_core, tdesc_data, i,
tdep->register_names[i]);
- /* Need to include %mxcsr, so add one. */
- num_regs += tdep->num_xmm_regs + 1;
- for (; i < num_regs; i++)
- valid_p &= tdesc_numbered_register (feature_sse, tdesc_data, i,
- tdep->register_names[i]);
+ if (feature_sse)
+ {
+ /* Need to include %mxcsr, so add one. */
+ num_regs += tdep->num_xmm_regs + 1;
+ for (; i < num_regs; i++)
+ valid_p &= tdesc_numbered_register (feature_sse, tdesc_data, i,
+ tdep->register_names[i]);
+ }
return valid_p;
}
and the SSE registers. This can be overridden for a specific ABI
by adjusting the members `st0_regnum', `mm0_regnum' and
`num_xmm_regs' of `struct gdbarch_tdep', otherwise the registers
- will show up in the output of "info all-registers". Ideally we
- should try to autodetect whether they are available, such that we
- can prevent "info all-registers" from displaying registers that
- aren't available.
-
- NOTE: kevinb/2003-07-13: ... if it's a choice between printing
- [the SSE registers] always (even when they don't exist) or never
- showing them to the user (even when they do exist), I prefer the
- former over the latter. */
+ will show up in the output of "info all-registers". */
tdep->st0_regnum = I386_ST0_REGNUM;
tdesc_data = tdesc_data_alloc ();
+ set_gdbarch_relocate_instruction (gdbarch, i386_relocate_instruction);
+
/* Hook in ABI-specific overrides, if they have been registered. */
info.tdep_info = (void *) tdesc_data;
gdbarch_init_osabi (info, gdbarch);
/* Initialize the standard target descriptions. */
initialize_tdesc_i386 ();
+ initialize_tdesc_i386_mmx ();
initialize_tdesc_i386_avx ();
/* Tell remote stub that we support XML target description. */
projects / binutils-gdb.git / blobdiff